<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        #title1{
            font-size: 50px;
        }
    </style>
</head>
<body>
    <p>欢迎来到<span id="title1">双十一</span>专场</p>
</body>
</html>